STUDY OF JOINT PROBABILITIES OF MASS OCCURRENCE IN SPECTRA

REFERENCE
.

SPECTRAL DATABASE

SINGLE MASS PROBABILITIES

MOST PROBABLE
Binary Intensity                     41 Da     P= 0.57
Ternary Intensity                   77 Da      P=0.49               Base Peak                            43 Da      P=0.057

BOUNDS    

All P's are from 0.0000 to 0.57

DETAILED BINARY PROBABILITIES

JOINT PROBABILITIES

BOUNDS
An Upper Limit Is the smallest individual mass P   in the spectrum.

The Lower Limit is the product of the individual mass P's in the spectrum.

OTHER CONCLUSIONS

 D. R. SCOTT, JOINT PROBABILITIES IN MASS SPECTRA,     UNPUBLISHED, 1997.

•  ALL CONCLUSIONS ARE BASED ON DATA FROM THE NIST/EPA MS REFERENCE DATABASE V.4 WITH 62235 SPECTRA.
  

WITH THREE LEVEL, OR MORE DETAILED, INTENSITY ENCODING, NO SINGLE MASS PROBABILITY CAN EXCEED 0.49.

• NO BASE PEAK CAN OCCUR AT A PROBABILITY GREATER THAN 0.057. THE BASE PEAK IS USUALLY THE MOST INFORMATIVE PEAK IN THE SPECTRUM.
                                                                   

        LIST OF BINARY SINGLE MASS PROBABILITIES

THE JOINT PROBABILITY OF ALL MASSES OCCURRING SIMULTANEOUSLY IN A SPECTRUM CAN NOT EXCEED 0.17 FOR ANY FIVE PEAKS NOR 0.07 FOR ANY TEN PEAKS.